Blinky example for SAMV

Author: twasilczyk

examples/samv/blink/main.cpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2021, Tomasz Wasilczyk
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <modm/architecture/interface/clock.hpp>
+#include <modm/platform.hpp>
+
+using namespace std::chrono_literals;
+using namespace modm::platform;
+
+struct SystemClock
+{
+	// Chosen to achieve 300MHz system clock
+	static constexpr uint32_t PllAMult = 25;
+	static constexpr uint32_t Frequency = 300'000'000;  // PllAMult * Osc 12MHz
+
+	static bool inline
+	enable()
+	{
+		ClockGen::setFlashLatency<Frequency / 2>();  // Flash runs off MCK
+
+		ClockGen::enableMainInternal(MainInternalFreq::Rc12Mhz);
+		ClockGen::selectMainClockSource(MainClockSource::Internal);
+		ClockGen::enablePllA<PllAMult>();
+		ClockGen::selectMasterClk<MasterClkSource::PLLA_CLK, MasterClkPrescaler::CLK_1, MasterClkDivider::Div2>();
+		ClockGen::updateCoreFrequency<Frequency>();
+
+		return true;
+	}
+};
+
+using Led0 = GpioD17;
+using Led1 = GpioD16;
+using Led2 = GpioD15;
+
+int
+main()
+{
+	WDT->WDT_MR = (WDT_MR_WDDIS_Msk);  // turn off Watchdog
+
+	SystemClock::enable();
+	SysTickTimer::initialize<SystemClock>();
+
+	Led0::setOutput(false);
+	Led1::setOutput(true);
+	Led2::setOutput(false);
+
+	while (1)
+	{
+		Led0::toggle();
+		modm::delay(500ms);
+	}
+
+	return 0;
+}

examples/samv/blink/openocd.cfg

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+source [find interface/jlink.cfg]
+transport select swd
+
+source [find target/atsamv.cfg]
+
+# Set boot mode selection to Flash (instead of SAM-BA on ROM)
+init
+halt
+atsamv gpnvm set 1

examples/samv/blink/project.xml

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+<library>
+  <options>
+    <option name="modm:target">samv70n20b-aabt</option>
+    <option name="modm:build:build.path">../../../build/samv/blink</option>
+    <option name="modm:build:openocd.cfg">openocd.cfg</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:platform:core</module>
+    <module>modm:platform:clock</module>
+    <module>modm:platform:gpio</module>
+    <module>modm:architecture:delay</module>
+    <module>modm:platform:clockgen</module>
+  </modules>
+</library>